A. 2 a − 2
B. a^2 −15
C. a^2 −8a −15
D. a^2 −2a −15
E. a^2 −2a +15
- The expression (2x + 5y) − (3x − 2y) is equivalent to:
F. −x − 3y
G. −x + 7y
H. x − 3y
J. −x + 7y
K. 5 x − 3y
- For all positive integers a, b, and c, which of the following expressions is equivalent to ?
A.
B.
C.
D.
E.
- Sheldon has 30 comic books. Some of the comic books were originally 10¢, and the others were originally 45¢. The original value of all
30 comic books is $9.65. How many 45¢ comic books does Sheldon have?
F. 11
G. 13
H. 15
J. 19
K. 21
- Let a be a real number. Which of the following is a value of a such that a^2 + 9a = 0 ?
A. 18
B. 6
C. 3
D. −3
E. −9
- Given 7a − b = 2a + 3b, which of the following is an expression for b ?
F.
